Method of making substitute for leather



Patented Dec. 27, 1927.

UNITED STATES HARRY HOROWITZ, OF NEW YORK, N. Y.

METHOD OF MAKING SUBSTITUTE FOR LEATHER.

No Drawing.

This inveniion relates generally to material substitutes and has more particular reference to a novel leather or rubber substitu'te.

The invention has for an object the provision of an improved leather or rubber substitute of desirable wearing qualities for use in the manufimtnre of rubber or leather goods, such as soles or heels, of boots or shoes, etc., and which can be HlflllltfEtCtlUfQtl and sold at a low cost.

For further comprehension of the invention, and of the objects and ad antages thereof, reference will be had to the follrnving description and to the appended claim in which the various novel features of the invention are more particularly set forth.

The invention consists in the use of chopped or ground leather, with powder, a solution of rubber, raw oil such asraw linseed oil, water, glue, and starch, and to en able others to make use of my invention, I give the following as one of the most approved formulas for compounding and nianufacturing the same.

Place in any suitable vessel, one quart of a solution of rubber, preferably made for cheapness, of old or scrap rubber, one ounce of glue, 100 drops of raw oil, one ounce of starch, and 100 to 200% by volume of water. 'Ihoroughly mix these ingredients at a normal temperature. Next, measure out five pounds of ground leather fibres nmterial, and add to it, two ounces of talcum powder, tl'iereafter, thoroughly mix the thus olitainod product. Then subject the product to a hydraulic pressure of pounds per square inch for 2, short period of time, say 10 minutes. Remove the product from the press and nunfinally or mechanically sink the lGtlt-lltl' fibres from the top and bottom surfaces of the product to a distance of about below these surfaces. This may be accmnplished by beating the si'lrfaces with a, wire brush. the wires thereof pushing the leather fibres down and as the wires are pulled out, the other material covering the would be apertures caused by the wires. Thereafter subject the product to a hydraulic pressure of about 100 pounds per square inch, and form it into a sheet. Repeat the manual or mechan- App1ication filed February 2, 1927. Serial No. 165,489.

ical sinking of the leather .[ibres from the top and bottom surfaces of the sheet by heating: with a wire brush. Finally again subject the product to hydraulic pressure until it is squeezed into a sheet of the desired. thickness. Allow the product to dry, which will. tube about seven days. The product may now be out as desired, and dyed as desired, and is then in condition for use as a luither or rubber sul'istitute. Due to the sinking of the leather fibres from the surfaces of the sheet, these surfaces are very smooth, and are ca pable of beinghighly polished.

While I have illustrated and described my invention with some degree of particularity, I realize that in. practice various alterations therein may be made. I therefore reserve the right and privilege of suhstitutiiur the glue with suitable gum and by Ollill'lgllljl the form of the details of construction, or otherwise altering); the arrangement of the corrd lated parts without departing from the spirit or the scope of the appended claim.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is:

The method of making a substitute for leather comprising the mixing together of one quart of solution of rubber, one ounce of glue, 100 drops of raw oil, one ounce of starch and 100% to 200% by volume of water at normal temperature, the addition to and tlmrough incorporation of five pounds of ground leather blues with the above mire ture, the subsequent addition of two (unions of talcum powder, the coin'prtv on; of the entire mass at a pressure o'l tn'mit y liwi pounds per square inch. the submerging ol' the leather fibre accrnnulatinp; on the surfaces of the mass after the above closeriljled mropression by beating; the same with a wire brush, the ernnpressing of the mass at a pressure of one hi'lndred pounds per square inch thereafter, subincrging of the leather tibre which, is forced to the surface during the second compression step, and the compressing and rolling thereafter required to produce a mass of desired thickness.

In testimony whereof I have aflixed my signature.

HARRY HOROWITZ.

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